I creat new 13w47c profile and I click play button.
About 5 second later Minecraft 13w47c is not open.
But open again start page
MC-40630
13w47c is not open
Resolved
Incomplete
0
Please attach the complete output of the "Development console" tab of the launcher.
Click the text, press CTRL-A to select all, then CTRL-C to copy, and CTRL-V to paste in a comment on this ticket.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".